Alfred f



A. F. McCOLLUM.

KNIFE CARRIAGE FOR PILE CUTTING ATTACHMENTS.

APPLICATION FLLED JUNE 28, l9I8.

1,322,591 6. Patented Nov. 25, 1919.

villi/z} v ALFRED F. MccoLLUM, or BLooMsBUnG', PENNSYLVANIA,

ASSIGNOR TO MAGEE CAR-PET KNIFE-CARRIAGE FOR PILE-CUTTING ATTACHMENTS.

Specification of Letters Patent.

Patented Nov. 25, 1919;

Application filed. June 28, 1918. Serial No. 242,474.

To all whom it may concern:

'Be it known that I, ALFRED F. MoCoLLUM, a citizen of the United States, residing in Bloomsburg, Columbia county, State of Pennsylvania, have invented Knife-Garriages for Pile-Cutting Attachments, of which the following is a specification.

In the operation of the pile cutting mechanism described and claimed in my Patent No. 1,161,710, dated, Novemberflii, 1916, I have found that the springs employed to position the auxiliary knife carriage accumulate dirt and lint so that in time they become incapable of proper operation with the result that the knife has a tendency to run out of the groove of the pile wires and frequently break or cause injury. One object of the present invention therefore, is to so construct the auxiliary knife carriage as to make possible the omission of the springs hitherto employed to position it on its supporting studs with a view to increasing the reliability of the attachment as well as to decrease the necessity for inspection and repairs. 7 V Another object of the invention is to so construct certain of the parts of the knife carriage forming part of a pile cutting attachment for a loom thatrcertainportions thereof subjected to wear under operating conditions, may be easily removed and re placed when this is desirable or necessary.

These objects and other advantageous ends I attain as hereinafter set forth, reference being had to the accompanying drawings, in which- V I V Figures 1 and 2 are respectively side and end elevations of a knife carriage embodying invention, the latter of these views showing the carriage-supporting bar :in sectionor V 3 is a vertical sectionon the line 3:-3-, Fig. 1;

Fig. 4 is a perspective view of'the'removable gib forming part of my invention;

- Fig. 5 is a side elevation showing a slightly modified form of knife carriage;

Fig. 6 is a vertical section on the line 6-6, Fig. 5;

Fig. 7 is an inverted plan ofthe auxiliary knife carriage illustrating another feature of the invention; and Fig. 8 is a perspective'view illustrating downwardly by the replaceable bearing plate,shown in detail in Fig. 7. 1

In the above drawings 1 represents a bar of rectangular cross section which extends across a loom and has slidably mounted upon it a main knife carriage 2. This includes a body consisting of a bottom member 8 and two side members 9 and 10 held to the bar 1 by two plates 3 and 4t bolted to the inner top portions of said side members so as to rest upon the top surface of thebar 1. The bolts 6 which hold said plates in position extend through vertically elongated openings in the side members so as to permit of'their adjustment when it is desired to take up wear between the knife carriage and the bar. 1

Between one of the side members as 10 of the knife carriage and the adjacent side of the supporting bar I mount a gib in the form of an elongated plate 11 of slightly less height than that of the bar 1 and provide it with parallel end extensions 12 designed to fit into correspondmgly formed recesses in the opposite ends of said side member so as to be flush with their respective surfaces. The outer face ;of the side member 9 has connected to it by bolts .13 a plate? whereby the rope or cable for carriage may be clamped to it, and on the similar face of the side member 10 are two horizontally projecting studs 1 1 which are preferably tubular and constitute supports or guides for the auxiliary or secondary knife carriage 15. The latter is free to slide on these studs toward and from the main carriage 2 and is provided with a vertically extending guideway for the pile cutting knife 16 which is designed. to be forced a beveled plate 17 having oppositely extending ends 18'and 19 for engagement with fixed abutments as shown in my above noted patent. When the extension 19 strikes its coacting abutment, said plate is moved away from the upper end of the knife, which is thereupon free to move upwardly in its guides under thev action of a spring 20.

One of the features of my invention resides in providing the auxiliary carriage 15 with extended bearings '21 for engagement with the, studs 14, and the length of these bearings is such that the knife 16 lies moving the knife 30 that the retaining in, a. vertical. plane midway between ,two other vertical planes, one includlng the outer ends of said extensions 21 and the other including that face of the auxiliary carriage l5'adjacent the main carriage 2. With this arrangement of parts, the engagement of the knife edge 22 with the pile of a fabric to be'cut cannotexert a twisting or onesided stress upon the auxiliary carriage and therefore, does not'cause this to press unevenly upon its supporting studs, although in-tlie absence of the elongated bearings or their equivalent, the rearward pressure-on itself" toward and from the knife causes binding of the carriage on the studs. With the construction shown however, itis free to' automatically adjust the main carriage in I order to allow the knife to follow the curvature of the pile wire in which it operates without tending to grip the'studs 14. The knife carriage may thus move on said studs between the adjacent face of the main car clusive,

duly limit the movement of the auxiliary carriage on the studs.

longitudinally inthe iary' knife carriage,

' three parts,

. 'wall and As conditions. there is considerable wear of one of the walls 26 of the groove 25 extending bottom of the auxil- I insert a conveniently removable plate 27 in the inner vertical side of said carriage so that its lower portion forms a part of this groove wall 26. As shown in Fig. 7 said wall on one side has i. 6., two inclined end portions and a central part whose surface is substantially parallel to the center line of the carriage. 3 The parts are therefore, 'so proportioned that the removable plate 27 provides the above noted middle part of the is exposed to the greatest wear under operating conditions. For'properlyretaining it in place, the groove or recessin which this plate is mounted is preferably undercut as illustrated and the edges of the plate are correspondingly inclined as shown in Fig. 8. When therefore, under operating conditions, the guiding rib or bar which enters the groove 25 Y f to properly position the knife relatively to the sharpening stones, unduly Wears the center partof the wall of said groove, the plate 27 which is held in place by a rivet 28, may be conveniently removed and replaced by a new plate of proper dimensions.

.1 Likewise when an objectionable amount I have found that under operatingv of wear has occurred between the supporting bar 1 and the surfaces provided by the side member 9 and gib ll of the main knife carriage, saidgib, which isp'referably made of cast iron, may 'becon'veniently removed and replaced by another having the thickness necessary to take up the wear which has occurred.

Owing to the extended bearings provided on the auxiliary "knife carriage, this will freely slide upon the studs 14 toward or from the main knife carriage in' permitting the knife to "follow "the; curvature of the pile. wires andthatwithout binding upon said-studs or 'requiring any devices such as springs to return it to orv maintain it"in amid-position'on the studs.

I claim:' a l. The combination in attachment for looms of a. slidably mount edmain knife carriage; studs projecting laterally from one side of said car riage; an auxiliary knife carriage slidably mounted 'on the studs and including extended 'b'ea'rings for the latter pro ecting beyond its front face; with ai kni'fe'on the-auxiliary carriage having its cutting .edge'in a plane substantially midway between two vertical planes of which one includes the rear face of the auxiliary carriageand the other includes the outer ends of the extended bearings. I 2. The combination: in a-pile-cutting at-' tachment for looms ofa slidably nounted main knife carriage studs projecting laterally from one side of said main carriage; an auxiliary? knife carriage slidably mounted on the studs and including substantially semi-cylindrical bearing extensions engaga pile cutting on the auxiliary carriage mountedwith its cuttingedge in a vertical plane substantially midway between the planes of the rear-face of the auxiliary knife carriage and of the ends of the bearing extensions respectively, with means adjacent the ends .of the studs for normally limiting outward movement of the auxiliary carriage thereon; i A V '3. The combinationin a pile cutting at tachment for looms'of a slidably in'ounted main knife carriage studs projecting laterally therefrom; an auxiliary knife carriage slidably mounted on" the studs andhaving a groove inits under side for the reception of positioning means, said groove having a wall" including a'straight-central portion and inclined end portions; with a removable plate mounted on the carriage, inposition to constitute said central portion of the groove wall. V 4. The combinationzin a pile cuttingattachment" for looms bf '21. slidably mounted main knif carriage; one side of said carriage; an auxiliaryknife studs projecting from carriage mounted on said studs and free to move into and remain in any given position thereon; bearing extensions for the studs projecting from the outer face of the auxiliary carriage; and a knife mounted on the auxiliary carriage between and to the rear of said bearing extensions with its cutting edge in a plane midway between two vertical planes respectively including the rear face of the auxiliary carriage the outer ends of the bearing extensions.

In witness whereof I affix my signature.

ALFRED F. MOGOLLUM.

and 10 

